0.039 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.055 * * * [progress]: [2/2] Setting up program.
0.063 * [progress]: [Phase 2 of 3] Improving.
0.063 * [simplify]: Simplifying:
  (/ (- (+ (* x x) (* y y)) (* z z)) (* y 2.0))